Abstract
This work aims to present results of the measurements of the density of the anhydrous ethanol fuel in the liquid phase, and the following thermal properties: thermal expansion coefficient and isothermal compressibility factor, in the temperature range of 277.15 K to 313.15 K and for pressures up to 15.0 MPa are presented. The density measurements were performed using a pycnometer that was calibrated, which presents a volume uncertainty of 0.020 cm3. Correlations were obtained for density, thermal expansion coefficient, and the isothermal compressibility factor. A system of measurement was developed capable of realizing density measurements using a pycnometer and a pressure cell with low uncertainties in different pressures and temperatures.
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Abbreviations
- ANP:
-
National Agency of Petroleum, Natural Gas and Biofuel
- Dimqt:
-
Division of Chemical and Thermal Metrology of INMETRO
- INMETRO:
-
National Institute of Metrology, Standardization and Industrial Quality
- Laflu:
-
Fluid Laboratory of INMETRO
- k :
-
Coverage factor
- \({k}_{L}\) :
-
Isothermal compressibility factor [MPa−1]
- En:
-
Normalized error
- \({\mathrm{M}}_{\mathrm{PL}}\) :
-
Mass of the filled pycnometer [g]
- \({\mathrm{M}}_{\mathrm{PV}}\) :
-
Mass of empty pycnometer [g]
- \({n}_{0}, {n}_{1}, {n}_{2}, {n}_{3}, {n}_{4}\) :
-
Constants
- \({\text{P}}_{\text{L}}\) :
-
Pressure of the liquid [MPa]
- Pr :
-
Reference pressure of the liquid equal to 0.1 MPa
- \({\text{T}}_{\text{L}}\) :
-
Temperature of the liquid [K]
- Tr :
-
Reference temperature of the liquid equal to 293.15 K
- \({\text{V}}_{0}\) :
-
Pycnometer volume [cm3]
- \({\alpha }_{L}\) :
-
Thermal expansion coefficient [K−1]
- \({\alpha}_{\text{P}}\) :
-
Thermal expansion coefficient of the pycnometer [K−1]
- \({\beta}_{\text{P}}\) :
-
Isothermal compressibility coefficient of the pycnometer [MPa−1]
- \({\gamma }_{eff}\) :
-
Effective degree of freedom
- ρ:
-
Density [g·cm−3]
- \({\uprho }_{\mathrm{a}}\) :
-
Density of the air during the measurement [g·cm−3]
- \({\uprho }_{\mathrm{b}}\) :
-
Density of the standard weights [g·cm−3]
References
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Acknowledgement
The author R.G. Pereira is grateful to the National Research Council of Brazil, CNPq. Authors J.J.P. Santos Junior and M. Rosendahl are grateful to PRONAMETRO and UNESA for the financial support.
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dos Santos Junior, J.J.P., Pereira, R.G., Rosendahl, M. et al. Measurements and Correlations of Density, Isothermal Compressibility Factor, and Thermal Expansion Coefficient of Anhydrous Ethanol Fuel as a Function of Temperature and Pressure. Int J Thermophys 42, 78 (2021). https://doi.org/10.1007/s10765-021-02825-w
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DOI: https://doi.org/10.1007/s10765-021-02825-w